Five hundred households in a middle-class neighborhood were recently surveyed as a part of an economic development study conducted by the local government. Specifically, for each of the 500 randomly selected households, the survey requested information on several variables, including the household’s level of indebtedness (excluding the value of any home mortgage). These data are provided in the file P2_6.XLS.

a. Find the maximum and minimum debt levels for the households in this sample.

b. Find the indebtedness levels at each of the 25th, 50th, and 75th percentiles. 

c. Compute and interpret the interquartile range in this case.